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forgot to add several source files

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This commit is contained in:
Mourner 2011-05-31 12:37:07 +03:00
parent e7410e6e03
commit cfdaebb299
3 changed files with 82 additions and 0 deletions
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10
src/geo/projection/Projection.LonLat.js Normal file
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L.Projection.LonLat = {
project: function(latlng) {
return new L.Point(latlng.lng, latlng.lat);
},
unproject: function(point, unbounded) {
return new L.LatLng(point.y, point.x, unbounded);
}
};

49
src/geo/projection/Projection.Mercator.js Normal file
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L.Projection.Mercator = {
MAX_LATITUDE: 85.0840591556,
R_MINOR: 6356752.3142,
R_MAJOR: 6378137,
project: function(/*LatLng*/ latlng) /*-> Point*/ {
var d = L.LatLng.DEG_TO_RAD,
max = this.MAX_LATITUDE,
lat = Math.max(Math.min(max, latlng.lat), -max),
r = this.R_MAJOR,
x = latlng.lng * d * r,
y = lat * d,
tmp = this.R_MINOR / r,
eccent = Math.sqrt(1.0 - tmp * tmp),
con = eccent * Math.sin(y);
con = Math.pow((1 - con)/(1 + con), eccent * 0.5);
var ts = Math.tan(0.5 * ((Math.PI * 0.5) - y)) / con;
y = -r * Math.log(ts);
return new L.Point(x, y);
},
unproject: function(/*Point*/ point, /*Boolean*/ unbounded) /*-> LatLng*/ {
var d = L.LatLng.RAD_TO_DEG,
r = this.R_MAJOR,
lng = point.x * d / r,
tmp = this.R_MINOR / r,
eccent = Math.sqrt(1 - (tmp * tmp)),
ts = Math.exp(- point.y / r),
phi = Math.PI/2 - 2 * Math.atan(ts),
numIter = 15,
tol = 1e-7,
i = numIter,
dphi = 0.1,
con;
while ((Math.abs(dphi) > tol) && (--i > 0)) {
con = eccent * Math.sin(phi);
dphi = Math.PI/2 - 2 * Math.atan(ts * Math.pow((1.0 - con)/(1.0 + con), 0.5 * eccent)) - phi;
phi += dphi;
}
return new L.LatLng(phi * d, lng, unbounded);
}
};

23
src/geo/projection/Projection.SphericalMercator.js Normal file
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L.Projection.SphericalMercator = {
MAX_LATITUDE: 85.0511287798,
project: function(/*LatLng*/ latlng) /*-> Point*/ {
var d = L.LatLng.DEG_TO_RAD,
max = this.MAX_LATITUDE,
lat = Math.max(Math.min(max, latlng.lat), -max),
x = latlng.lng * d,
y = lat * d;
y = Math.log(Math.tan(Math.PI/4 + y/2));
return new L.Point(x, y);
},
unproject: function(/*Point*/ point, /*Boolean*/ unbounded) /*-> LatLng*/ {
var d = L.LatLng.RAD_TO_DEG,
lng = point.x * d,
lat = (2 * Math.atan(Math.exp(point.y)) - Math.PI/2) * d;
return new L.LatLng(lat, lng, unbounded);
}
};